A181017 Number of nX(n+6) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0

0, 0, 0, 0, 0, 0, 10, 17126, 24027686, 40597122781, 133344779207591

Offset

1,7

Comments

Superdiagonal 6 of A181011

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for 7X13
..0..1..1..1..1..1..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1..1..1..1..1..1
..1..0..1..0..0..0..0..0..0..1..1..1..1
..1..0..1..0..0..1..1..1..1..0..0..0..0
..1..0..1..0..1..0..0..1..1..0..0..1..1
..1..0..1..0..1..0..1..0..1..0..1..0..1

Crossrefs

Sequence in context: A179425 A203466 A203695 * A360213 A055321 A092300

Adjacent sequences: A181014 A181015 A181016 * A181018 A181019 A181020

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved